stdbuf(1)

NAME

   stdbuf  -  Run  COMMAND,  with  modified  buffering  operations for its
   standard streams.

SYNOPSIS

   stdbuf OPTION... COMMAND

DESCRIPTION

   Run COMMAND,  with  modified  buffering  operations  for  its  standard
   streams.

   Mandatory  arguments  to  long  options are mandatory for short options
   too.

   -i, --input=MODE
          adjust standard input stream buffering

   -o, --output=MODE
          adjust standard output stream buffering

   -e, --error=MODE
          adjust standard error stream buffering

   --help display this help and exit

   --version
          output version information and exit

   If MODE is 'L' the corresponding stream will be  line  buffered.   This
   option is invalid with standard input.

   If MODE is '0' the corresponding stream will be unbuffered.

   Otherwise  MODE  is  a  number  which  may  be  followed  by one of the
   following: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G,
   T,  P,  E,  Z,  Y.  In this case the corresponding stream will be fully
   buffered with the buffer size set to MODE bytes.

   NOTE: If COMMAND adjusts the buffering of its standard  streams  ('tee'
   does  for  example)  then  that  will override corresponding changes by
   'stdbuf'.  Also some filters (like  'dd'  and  'cat'  etc.)  don't  use
   streams for I/O, and are thus unaffected by 'stdbuf' settings.

EXAMPLES

   tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
   This will immedidately display unique entries from access.log

BUGS

   On  GLIBC  platforms,  specifying  a  buffer  size,  i.e.,  using fully
   buffered mode will result in undefined operation.

AUTHOR

   Written by Padraig Brady.

REPORTING BUGS

   GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
   Report stdbuf translation bugs to <http://translationproject.org/team/>

COPYRIGHT

   Copyright  2016 Free Software Foundation, Inc.   License  GPLv3+:  GNU
   GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
   This  is  free  software:  you  are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

   Full documentation at: <http://www.gnu.org/software/coreutils/stdbuf>
   or available locally via: info '(coreutils) stdbuf invocation'

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Free and Open Source Software